Beating or hammering tool



Feb. 10, 1931. E. H. w. wl-:IBULL HEATING OR HAMMERING TOOL Filed July 3, 1928 mama Feb. 1o, i931 UNITED sTATEs PATENT OFFICE ERNST HJALMAB WALODDI WEIBULL, Ol' SALTSJOBADEN, SWEDEN, .ABSIGNOB TO AXTIEBOLAGET NORDISKA ABMATUBFABBIKEBNA, 0F STOCKHOLM, SWEDEN, A.

LIIITED COMPANY BEATIN G OB. HLHHEBING TOOL Application led July 3, 1928, Serial No. 290,152, and in Sweden January 26, 1928.

The present invention relates to improvements 1n striking tools of the kind, which consists artly of a suitabl power-rotated striking Itiody, mountedl to s ide axially and provided with one or more oblique striking faces, cooperating, in the striking position,

` with corresponding oblique faces located on an anvil and thus giving the striking body a recoil movement, and partly of an energy storer, which cooperates with and is loaded by the striking body during the recoil movement of the latter for supplying the energy necessary for the striking movement.

The object of the invention is the provision of a striking body consisting of o r provided with one or more rollers, the circumferential faces of which form the oblique faces on the striking body. i

Other characteristic features of the invention will be more clearly set forth in the following in connection with the embodiment illustrated in the annexed drawing in which Fig. 1 is a longitudinal section of the improved striking tool, and

Fig. 2 is a section on the line 2-2 of Fig. 1.

Referring to the drawing in detail, 1 is the driving shaft. 2 is a guide-groove in said shaft of spiral or other shape. 3 is the striking body. 4 is a key, extending into the guide-groove 2 and the striking body 3. 5 is a frame or support adapted to carry the anvil 6, 7 are the ob-lique faces formed as rollers mounted to turn at the front part of the striking body on studs 8 and screws 9 and constituting a part of said striking body. 10 are the oblique faces, arranged on the anvil 6 and 11 is an energy storer in the form of aspring, placed around the striking body 3.

The driving shaft 1 is rotated by means of an electric motor 12, located in the frame 13, the rotor of which is fixed to the driving shaft 1, which is supported partly in a middle-bottom 14 in the frame 13 and partly in the handle 15 carried by the frame 13.

The arrangement Works in the following manner.

Assuming that the parts occupy the position shown in the drawing: in this position the striking body 3-7 moves in a direction towards the anvil 6 under the influence of the spring 11, and is rapidly rotated by means of the motor 12, the rotating movement of which is transmitted to the striking body by the y shaft 1 and key 4.

When the rollers 7 strike against the oblique faces 10 of the anvil 6, the stroke will be transmitted to the anvil, and at the same time on account of the ra id rotation of the rollers over the oblique aces l0, the striking body 3 7 will be displaced axially against the iniluence of the spring 11, in which latter the energy necessary for the next successive striking movement of the striking body is stored. Although a spring has been disclosed herein as the energy storing means it will be understood that any other convenient kind of energy storer may be used.

Having now particularly described the nature of my invention and the manner of its operation, what I claim is:

1. In combination, a striking tool including an anvil having oblique faces, a rotatable striking body mounted to slide axially and having an oblique striking face adapted, in the striking position, to cooperate with the oblique faces on the anvil to effect recoil movement, and an energy storer cooperating with the striking body adapted to be rotated during the recoil of the striking body,

the oblique face of the striking body including a roller disposed to engage the oblique face of the anvil.

2. In combination, a striking tool including an anvil having oblique faces, a rotatable striking body mounted to slide axially and vhaving oblique striking faces adapted, in the 3. In combination, a striking body mounted for rotary movement, an anvil having an oblique face, and a member rotatable on the striking body engageable with the oblique face of the4 anvil and mounted to rotate `100 about an axis substantially perndicular to the axis of rotation of the str1 'gg body.

4. In combination, a striking b y mounted for rotary movement, an anvil having an oblique face and members rotatable on the strikm body en ageable with the oblique face o the anvi and mounted to rotate about an axis substantially perpendicular to -the axis of rotation of the strikln body.

10 5. In combination, a striking bo y mount-` ed for rotary movement, an anv11 havmg an oblique face and members rotatable on the striking body engageable with the oblique v face of the anvil and mounted to rotate about 15 an axis substantially perpendicular tothe axis of rotation of the striking body and located on opposite sides of the axis of rotation of sai striking body. l

6. In combination, a striking body mount- .26 ed for combined rotary and axial movement,

an anvil provided with an oblique face, a member rotatable on the striking body and engageable with the oblique face of the anvil, said member being rotatable about an 25 axis substantially perpendicular to the axis of rotation of the striking body.

7. In combination, a strlking body mounted for combined rotary and axial movement, an anvil provided with a`n oblique face, a

so member rotatable on the striking body and engageable with the oblique face of the anvil and members rotatably mounted on the bo y and rotatable about an axis perpendicular to the axis of rotation of the striking 35 body and on opposite-sides of the latter.

ERNST HJALMAR WALODDI WEIBULL. 

